How to predict where segmentation fault occurs

How to predict where segmentation fault occurs if we are increasing a pointer in a infinite loop?

I have thought that we can use the alarm signal handler and it will be invoked after every 1 second and it will print the address pointed to by the pointer so that when the segmentation fault would occur we would get a very nearby address where it occurred.

Could there be more better solution? If there then please tell. Thanks in advance

Code :

#define SECOND 1
 
 int *str;
 
 void  ALARMhandler(int sig)
 {
      signal(SIGALRM, SIG_IGN);      
 
 
 printf("ptr=%u \n",*str);
 
      alarm(SECOND);                     /* set alarm for next run   */
      signal(SIGALRM, ALARMhandler);     /* reinstall the handler    */
 }
 
 
 
 int main()
 {
 
 int *ptr;
 str=&ptr;
 int a;
 ptr=&a;
 signal(SIGALRM,ALARMhandler);    
 alarm(SECOND);                   
 
 
 for(;;)
 {
     ptr++;
 
 
 }
 
 return 0;
 
 }
 

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